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rough idle on 6.0l 2500hd

hey guys i need your help. i have a 2004 2500hd with the 6.0 and it has been idling rough and sometimes dies. i replaced the intake manifold gaskets. This 6.0 was the later model that they switched the fuel pressure regulator from the rail in to the fuel model in the tank. and other solutions? mass air? o2 sensors?

hi i had the same problem with mine, gm has a bulletin out for these 6.0l with electronic throttle body no throttle cable for rough idle and sometime stall, clean the throttle body with a carb cleaner it gets gummer up betweenthe bory and the throttle plate, if that does not fix it there is a reprograming of the ecm with new software. but try cleaning you throttle first should take care of it.